<h1>overflow:</h1>
<p><marquee style="width:100px; height:20px; background:#CCC; overflow:hidden;">123</marquee></p>
<h1>display:</h1>
<p><marquee style="width:100px; height:20px; background:#CCC; display:inline-block;">123</marquee></p>
<h1>-moz-bind:</h1>
<p><marquee style="width:100px; height:20px; background:#CCC; -moz-binding:none;">123</marquee></p>